Shared IP error when adding new site

Hi, I'm having trouble setting up a new site with ISPConfig - I get a shared IP error.

When I set up the site, it only gives me the option of using the internal IP, which I assume is good. I've looked in the forums and tried changing the ISPConfig server address in /home/admispconfig/ispconfig/lib/config.inc.php between the internal and external IP numbers, and tried using one of the external URL FQDN's there too, but it didn't seem to help. My server is at www.bathskatepark.org, and I have www.reachmorse.org pointed to the same external IP. With no new sites installed, when I go to www.bathskatepark.org I get the default apache web page. When I add www.reachmorse.org as a new site, both domains give the shared IP error.

I have a linksys wrt54g router acting as a gateway. I have the following ports forwarded:
ispconfig 81
ftp 21
pop3 110
https 443
bind 53
ssh 22
smtp 25
http 80
domain 53
imaps 993...
and that is all that I have space for on the admin web site for the router. But, I also tried the turning off the fire wall on the router, and still no luck.

1) Point all your domains in DNS to your external IP address.
2) Forward the ports you named above to your internal server IP address.
3) Setup the websites in ISPCOnfig with your internal server IP, it must be the same IP where you forwarded the ports on your router.

1) Point all your domains in DNS to your external IP address.
2) Forward the ports you named above to your internal server IP address.
3) Setup the websites in ISPCOnfig with your internal server IP, it must be the same IP where you forwarded the ports on your router.

Click to expand...

Thanks for the quick response Till. I had tried that set-up, and just tried it again. Unfortunately, as soon as I add a second site, I get the shared IP error.

Are there settings from my DNS provider (yahoo.com, both domains are set up as masked forwarding) that would effect this? Or router issues I could look into?

No I realise this. stanleyroad.dnsalias.com is a domain provided by dyndns.org, the dynamic DNS company that continuosly changes where it's pointing to follow our dynamic IP address. I have then set up a wildcard CNAME for anything.stanleyroad.org.uk (apart from stanleyroad.org.uk, mail.stanleyroad.org.uk and www.stanleyroad.org.uk which go to our remote web server) to point to stanleyroad.dnsalias.com.